contiki/examples/websockets/websocket-example.c

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2016-11-02 20:54:02 +00:00
/*
* Copyright (c) 2012, Thingsquare, http://www.thingsquare.com/.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include "contiki.h"
#include "websocket.h"
#include <stdio.h>
static struct websocket s;
static void callback(struct websocket *s, websocket_result_t r,
const uint8_t *data, uint16_t datalen);
#define RECONNECT_INTERVAL 10 * CLOCK_SECOND
static struct ctimer reconnect_timer;
/*---------------------------------------------------------------------------*/
PROCESS(websocket_example_process, "Websocket Example");
AUTOSTART_PROCESSES(&websocket_example_process);
/*---------------------------------------------------------------------------*/
static void
reconnect_callback(void *ptr)
{
websocket_open(&s, "ws://172.16.0.1:8080/",
"contiki", NULL, callback);
}
/*---------------------------------------------------------------------------*/
static void
callback(struct websocket *s, websocket_result_t r,
const uint8_t *data, uint16_t datalen)
{
if(r == WEBSOCKET_CLOSED ||
r == WEBSOCKET_RESET ||
r == WEBSOCKET_HOSTNAME_NOT_FOUND ||
r == WEBSOCKET_TIMEDOUT) {
ctimer_set(&reconnect_timer, RECONNECT_INTERVAL, reconnect_callback, s);
} else if(r == WEBSOCKET_CONNECTED) {
websocket_send_str(s, "Connected");
} else if(r == WEBSOCKET_DATA) {
printf("websocket-example: Received data '%.*s' (len %d)\n", datalen,
data, datalen);
}
}
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(websocket_example_process, ev, data)
{
static struct etimer et;
PROCESS_BEGIN();
ctimer_set(&reconnect_timer, RECONNECT_INTERVAL, reconnect_callback, &s);
websocket_init(&s);
while(1) {
etimer_set(&et, CLOCK_SECOND / 8);
PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&et));
char buf[] = "012345678";
static int count;
buf[0] = (count % 9) + '0';
count++;
websocket_send_str(&s, buf);
}
PROCESS_END();
}
/*---------------------------------------------------------------------------*/